// when the DOM is ready...
$(document).ready(function () {
	$.scrollTo('0px');
    var $panels = $('#slider .scrollContainer > div');
    var $container = $('#slider .scrollContainer');

    // if false, we'll float all the panels left and fix the width 
    // of the container
    var horizontal = true;

    // float the panels left if we're going horizontal
    if (horizontal) {
        $panels.css({
            'float' : 'left',
            'position' : 'relative' // IE fix to ensure overflow is hidden
        });

        // calculate a new width for the container (so it holds all panels)
        $container.css('width', $panels[0].offsetWidth * $panels.length);
    }

    // collect the scroll object, at the same time apply the hidden overflow
    // to remove the default scrollbars that will appear
    var $scroll = $('#slider .scroll').css('overflow', 'hidden');
	
  	var panelName = $.getURLParam("panel");

    // handle nav selection
    function selectNav() {
		$('.category-panel-selector-on').removeClass('category-panel-selector-on');
		$(this).parents(".category-panel-selector").addClass("category-panel-selector-on");
	}
		
	$(".category-panel-selector").hover(
		function(){
			$(this).find("h2").css({ 'text-decoration':'underline' });
		},
		function(){
			$(this).find("h2").css({ 'text-decoration': 'none' });
		}	
	);
	
	$('#slider .navigation').find('a').click(selectNav);

    // go find the navigation link that has this target and select the nav
    function trigger(data) {
        var el = $('#slider .navigation').find('a[href$="' + data.id + '"]').get(0);
        selectNav.call(el);
    }

	if (window.location.hash) {
        trigger({ id : window.location.hash.substr(1) });
    } else {
        $('.navigation a').eq(1).click();
    }

    // offset is used to move to *exactly* the right place, since I'm using
    // padding on my example, I need to subtract the amount of padding to
    // the offset.  Try removing this to get a good idea of the effect
    var offset = parseInt((horizontal ? $container.css('paddingTop') : $container.css('paddingLeft')) || 0) * -1;

    var scrollOptions = {
        target: $scroll, // the element that has the overflow

        // can be a selector which will be relative to the target
        items: $panels,

        navigation: '.navigation a',

        // allow the scroll effect to run both directions
        axis: 'xy',

        onAfter: trigger, // our final callback

        offset: offset,

        // duration of the sliding effect
        duration: 400,

        // easing - can be used with the easing plugin: 
        // http://gsgd.co.uk/sandbox/jquery/easing/
        easing: 'swing'
    };

    // apply serialScroll to the slider - we chose this plugin because it 
    // supports// the indexed next and previous scroll along with hooking 
    // in to our navigation.

    $('#slider').serialScroll(scrollOptions);

    // now apply localScroll to hook any other arbitrary links to trigger 
    // the effect
    $.localScroll(scrollOptions);

    // finally, if the URL has a hash, move the slider in to position, 
    // setting the duration to 1 because I don't want it to scroll in the
    // very first page load.  We don't always need this, but it ensures
    // the positioning is absolutely spot on when the pages loads.
    scrollOptions.duration = 1;
	
   	$.localScroll.hash(scrollOptions);  	
   	
   	/*
   	 * Adding selectors for the navigation highlight
   	 */
   	
   	$(".lab-switch").click(function(){
		$("#nav_labTest").addClass("nav_labTest_hover");
		$("#nav_labTest .nav_heading a").css({color:"#fff"});
		
		$("#nav_inspectionSvc").removeClass("nav_inspectionSvc_hover");
		$("#nav_inspectionSvc .nav_heading a").css({color:"#000"});
		
		$("#nav_audits").removeClass("nav_audits_hover");
		$("#nav_audits .nav_heading a").css({color:"#000"});
	});
	
	$(".inspection-switch").click(function(){
		$("#nav_inspectionSvc").addClass("nav_inspectionSvc_hover");
		$("#nav_inspectionSvc .nav_heading a").css({color:"#fff"});
		
		$("#nav_labTest").removeClass("nav_labTest_hover");
		$("#nav_labTest .nav_heading a").css({color:"#000"});
		
		$("#nav_audits").removeClass("nav_audits_hover");
		$("#nav_audits .nav_heading a").css({color:"#000"});
	});
	
	$(".audit-switch").click(function(){
		$("#nav_audits").addClass("nav_audits_hover");
		$("#nav_audits .nav_heading a").css({color:"#fff"});
		
		$("#nav_inspectionSvc").removeClass("nav_inspectionSvc_hover");
		$("#nav_inspectionSvc .nav_heading a").css({color:"#000"});
		
		$("#nav_labTest").removeClass("nav_labTest_hover");
		$("#nav_labTest .nav_heading a").css({color:"#000"});
	});
});

jQuery.extend({
/**
* Returns get parameters.
*
* If the desired param does not exist, null will be returned
*
* @example value = $.getURLParam("paramName");
*/ 
 getURLParam: function(strParamName){
	  var strReturn = "";
	  var strHref = window.location.href;
	  var bFound=false;
	  
	  var cmpstring = strParamName + "=";
	  var cmplen = cmpstring.length;

	  if ( strHref.indexOf("?") > -1 ){
	    var strQueryString = strHref.substr(strHref.indexOf("?")+1);
	    var aQueryString = strQueryString.split("&");
	    for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
	      if (aQueryString[iParam].substr(0,cmplen)==cmpstring){
	        var aParam = aQueryString[iParam].split("=");
	        strReturn = aParam[1];
	        bFound=true;
	        break;
	      }
	      
	    }
	  }
	  if (bFound==false) return null;
	  return strReturn;
	}
});